Cape Town, South Africa’s second wealthiest city, is piloting a new plan for the 146,000 households in its informal settlements: QR-coding their homes. According to Booi, residents will be able to scan their QR codes and send them to the city via WhatsApp for responses to issues like blocked drains and flooding. Booi also said that in the future “it will be easier to link residents to other state entities such as SASSA [the South African Social Security Agency],” the certificates can “act as proof of residence in the event of the resident interacting with banks ... and GPS coordinates can be used for e-hail services and/or deliveries.” Because the dwellings in informal settlements are often ignored in digital map tools like Google Maps, services like UberEats and Didi Apps currently refuse to serve them.